——I think it's going to be a big problem.

　　——Yes, it could be.

　　——I wonder ________ we can do about it.

[　　]

A．if　　　　　　　B．how

C．what　　　　　 D．that

　　——Are you still thinking about yesterday's game?

　　——Oh, that's ________.

[　　]

A．what makes me feel excited

B．whatever I feel excited about

C．how I feel about it

D．when I feel excited

It is pretty well understood ________ controls the flow of carbon dioxide in and out the atmosphere today.

[　　]

A．that　　　　　　B．when

C．what　　　　　　D．how

Why! I have nothing to confess. ________ you want me to say?

[　　]

A．What is it that

B．What it is that

C．How is it that

D．How it is that

Bill's aim is to inform the viewers that cigarette advertising on TV is illegal, ________?

[　　]

A．isn't it　　　　　　B．is it

C．isn't he　　　　　　D．is he

　　——Do you like ________ here?

　　——Oh, yes. The air, the weather, the way of life. Everything is so nice.

[　　]

A．this　　　　　　B．these

C．that　　　　　　D．it

They like to live in the house ________ a lot of trees, flowers and grass around.

[　　]

A．while　　　　B．during

C．with　　　　D．for

It won't be long ________ people realize bad habits will cause a lot of trouble.

[　　]

A．before　　　　B．when

C．since　　　　 D．that

________ turn is ________ to clean the bedroom?

[　　]

A．Which; it　　　　　B．Whose; it

C．Which; that　　　　D．Whose; that

The birthday party started with a song of“Happy Birthday to you”, and ended up ________ the singing of“Auld Lang Syne”.

[　　]

A．as　　　　　B．for

C．with　　　　D．to